I dare say most things like TFT screens, Ethernet etc that doesn't have native commands in PBP could be used could work with the aid of asm code etc, but then IMO that then defeats the object of using PBP.
while thats true a pbp that can incorporate external libraries and the sort of memory management needed to support them would not resemble the existing version in any familiar way. it would also need to support all the existing on chip hw modules and pps, not to mention have realtime source level debugging. [xc8free does all that and more]
if you look around all the pic 8bit forums are pretty quiet and getting quieter , a few have diappeared . its not an enviroment to inspire investment .

perhaps we could add a couple of new dimensions to the forum
xc8 and asm

and be more like a pic8 support group. pic hardware is pic hardware and pbp is stalled ,but we can still learn .
any thoughts ?

ps i have not joined the microchip forum , i do look but have not found it particularly useful